Results 81 to 90 of about 2,870 (194)

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

A Kinematic Model of a Humanoid Lower Limb Exoskeleton with Hydraulic Actuators. [PDF]

Sensors (Basel), 2020
Glowinski S, Krzyzynski T, Bryndal A, Maciejewski I.   +3 more
europepmc   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Concept, Tests, and Optimum Design of Novel Negative Stiffness Friction Dampers for Seismic Protection of Long‐Span Bridges

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Viscous dampers (VDs) are widely used to mitigate the excessive responses of long‐span bridges. However, VDs face some intricate challenges in engineering practices, including high damping coefficient requirement, potential base shear amplification and tremendous damping force under high velocity. To address these issues, this study develops a
Ruisheng Ma, Shaodong Jiang, Kun Xu, Qiang Han, Xiuli Du, Kaiming Bi   +5 more
wiley   +1 more source

System Identification of a Servo-Valve Controlled Hydraulic Cylinder Operating Under Variable Load

Mathematics
This work presents an in-depth study on the system identification of a servo-valve controlled hydraulic cylinder operating under variable load. This research addresses the growing demand for improved control systems (enhancing time response, settling ...
Daniel Catalin Stroita, Dorin Bordeasu, Florin Dragan   +2 more
doaj   +1 more source

Influence of Adhesive Type on Heat Induced Delamination in Tension Loaded Shear Lap Cross‐Laminated Timber Samples Exposed to Radiant Heat Flux

Fire and Materials, EarlyView.
ABSTRACT Heat induced delamination (HID) is a phenomenon in engineered wood products which may result in the detachment of the bonded timber lamellae before charring propagates to the bond line interphase. This study aims to correlate the thermal degradation of two 1‐c‐polyurethane adhesives at the microscale to the thermo‐hydro‐mechanical behaviour of
A. Čolić, F. Wiesner, M. Spearpoint, D. Hopkin, L. Bisby   +4 more
wiley   +1 more source

Recent advances in multifunctional soft robots: A materials–structures–systems co‐design perspective for synergistic integration

FlexMat, EarlyView.
Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu, Zicao Peng, Chong Sun, Haitao Yang   +3 more
wiley   +1 more source

Comprehensive review of permanent magnet actuator for high and medium voltage circuit breakers application: Design, optimization and control

Results in Engineering
Permanent magnet actuators are widely used in fields requiring precise and reliable motion control, such as valves, pumps, and switches. They have also been extensively applied in vacuum circuit breakers, particularly in high- and medium-voltage ...
Guanbao Zeng, Lijian Wu, Tao Wang, Dianhe Zhao   +3 more
doaj   +1 more source

Innovative doped flaky FeSiCr interface synergy for developing bidisperse magnetorheological fluids with super‐performance

InfoScience, EarlyView.
An excellent comprehensive performance bidisperse magnetorheological fluid (MRFs) was developed by blending self‐synthesized micron‐sized flaky FeSiCr particles with CIPs. Through the synergistic modification of particle properties, morphology and composition, this approach overcomes the challenges of achieving an optimal balance among key performance ...
Tianxiang Du, Penghui Zhao, Shiqiang Guan, Yinhao Diao, Zenghui Zhao, Hao Huang, Ning Ma, Yonghu Huang, Xufeng Dong   +8 more
wiley   +1 more source

Finite‐Time Disturbance Observer‐Based Nonlinear Robust Adaptive Control of Hydraulic Manipulator With Parameter Identification

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Hydraulic manipulators exhibit strong coupling, pronounced nonlinearities, and significant modeling uncertainties, which hinder high‐precision motion control. This paper proposes a finite‐time disturbance observer–based nonlinear robust adaptive control (RAC‐FTDO) framework enhanced by a physically consistent dynamic parameter identification ...
Tianyu Gao, Xianglong Liang, Wenxiang Deng, Jianyong Yao   +3 more
wiley   +1 more source